Proton Pistol 1.0

//Proton Pistol control code.
//Written by J.Teasdale - GBFans WindDrake
//Dog simple code here, with room for expansion.


//Inputs
int TriggerSwitch = 0;

//Outputs
int SoundTrigger = 4;
int NFET = 2;

//Timer Variables
unsigned long currentMillis = 0;
unsigned long previousMillis = 0;
long PlayTime = 2352; //Length of Sound File EXACTLY in mS.
unsigned long PlayTimer = 0;

//LED Cycle Times
long LEDOn = 25;
long LEDOff = 50;

//State Variables (these must mirror states in Setup loop)
int TriggerState = HIGH;
int SoundState = HIGH;
int NFETState = LOW;

//Boot Setup
void setup() {
  pinMode(TriggerSwitch, INPUT_PULLUP);
  pinMode(SoundTrigger, OUTPUT);
  pinMode(NFET, OUTPUT);
  digitalWrite(SoundTrigger, TriggerState);
  digitalWrite(NFET, NFETState);
}

//Main Loop
void loop() {
  currentMillis = millis(); //update the timer for the LED
  PlayTimer = millis(); //update the timer for the sound playback
  TriggerState = digitalRead(TriggerSwitch); //Update the state of the trigger.

  //Here's the LED driver code.
  if ((NFETState == HIGH) && (currentMillis - previousMillis >= LEDOn)) //If LED is on (Logic Level NFET gate HIGH) beyond time limit
  {
    NFETState = LOW; //Turn off FET
    previousMillis = currentMillis; //Update the timer.
    digitalWrite(NFET, LOW); //Actually turn off the FET pin.
  }
  else if ((NFETState == LOW) && (currentMillis - previousMillis >= LEDOff) && (TriggerState == LOW)) //If LED is OFF for too long and the trigger is held down..
  {
    NFETState = HIGH; //Turn it ON
    previousMillis = currentMillis; //Update the timer.
    digitalWrite(NFET, HIGH); //Turn ON the NFET gate.
  }
    //Here's the Sound driver code.
  if ((currentMillis - PlayTimer >= PlayTime) && (SoundState == LOW)) //If  sound is playing..
  {
    SoundState = HIGH; //Release sound trigger line.
    PlayTimer = currentMillis; //Update the timer.
    digitalWrite(SoundTrigger, HIGH); //Release the sound trigger line to the WT588 sound chip.
  }
  else if ((SoundState == HIGH) && (TriggerState == LOW)) //If trigger is pushed and sound is currently not queued..
  {
    SoundState = LOW; //Activate the sound trigger line (State).
    PlayTimer = currentMillis; //Update the timer.
    digitalWrite(SoundTrigger, LOW); //Activate the sound trigger line.
  }
}